control.sample_system

control.sample_system(sysc, Ts, method='zoh', alpha=None, prewarp_frequency=None)

Convert a continuous time system to discrete time by sampling

Parameters

  • sysc (LTI (StateSpace or TransferFunction)) – Continuous time system to be converted

  • Ts (float > 0) – Sampling period

  • method (string) – Method to use for conversion, e.g. ‘bilinear’, ‘zoh’ (default)

  • alpha (float within [0, 1]) – The generalized bilinear transformation weighting parameter, which should only be specified with method=”gbt”, and is ignored otherwise. See scipy.signal.cont2discrete().

  • prewarp_frequency (float within [0, infinity)) – The frequency [rad/s] at which to match with the input continuous- time system’s magnitude and phase (only valid for method=’bilinear’)

Returns

sysd – Discrete time system, with sampling rate Ts

Return type

linsys

Notes

See StateSpace.sample() or TransferFunction.sample() for further details.

Examples

>>> sysc = TransferFunction([1], [1, 2, 1])
>>> sysd = sample_system(sysc, 1, method='bilinear')